Question

Choose a value for a that is greater than 5 and less than 15. Evaluate the
perimeter of the pen for that value, using one of the expressions that you
wrote.
My expression: 2a +2b

Answer 1

. Explain why you used that expression to evaluate the perimeter of the
donkey’s pen.

Answer 2

Try This
You have 20 feet of fencing material to make a pen for your dog. The design of the pen is given as follows.
An illustration shows a rectangle named as Dog Pen with length as lower m and width as lower n.

Find the perimeter of the dog pen in terms of m

and n
.
Will you be able to create a dog pen with the following dimensions? Explain your answers.

m=3 feet by n=2 feet

m=5.5 feet by n=3 feet
m=7.5 feet by n=5.5 feet

List the possible dimensions of the dog pen that you can make out of the available fencing material.
Among the dimensions you listed, which should you use to make the dog pen? Explain your reasoning.